Method for preparing cubic nano calcium carbonate by supergravity-micro-interface mass transfer enhanced carbonization method

A nano-calcium carbonate and super-gravity technology, applied in the direction of calcium carbonate/strontium/barium, nanotechnology, etc., can solve the problems of shortening the production cycle, achieve the effects of shortening the production cycle, low cost, and improving gas holdup

Pending Publication Date: 2022-04-29
GUANGXI UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a method for preparing cubic nano-calcium carbonate by supergravity-micro-interface mass transfer enhanced carbonization method, so as to solve the problem of how to shorten the production cycle and reduce the production cost

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  • Method for preparing cubic nano calcium carbonate by supergravity-micro-interface mass transfer enhanced carbonization method
  • Method for preparing cubic nano calcium carbonate by supergravity-micro-interface mass transfer enhanced carbonization method
  • Method for preparing cubic nano calcium carbonate by supergravity-micro-interface mass transfer enhanced carbonization method

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Embodiment 1

[0033] Such as figure 1 , 2 Shown, a kind of hypergravity-micro-interface mass transfer enhanced carbonization method prepares the method for cubic nano-calcium carbonate, comprises the following steps:

[0034] S1. Take highly active calcium oxide, the weight ratio of water to calcium oxide is 5:1, stir and digest at 80°C for 2 hours, and digest the Ca(OH) 2 The slurry passes through a 200-mesh sieve to remove large particles of impurities to obtain refined Ca(OH) 2 Slurry, resulting refined Ca(OH) 2 The slurry is aged at room temperature for more than 12h, and the aged Ca(OH) 2 The slurry is adjusted to 4% (mass percentage);

[0035] S2. Before the carbonization reaction, a certain amount of glucose (2% of the theoretically generated calcium carbonate mass) is added to the Ca(OH) 2 In the slurry, stir to make it evenly mixed; the refined Ca(OH) 2 Put the slurry into the supergravity-micro-interface reactor, adjust to the initial carbonization reaction temperature of 20...

Embodiment 2

[0039] Such as figure 1 , 2 Shown, a kind of hypergravity-micro-interface mass transfer enhanced carbonization method prepares the method for cubic nano-calcium carbonate, comprises the following steps:

[0040] S1. Take highly active calcium oxide, the weight ratio of water to calcium oxide is 5:1, stir and digest at 80°C for 2 hours, and digest the Ca(OH) 2 The slurry passes through a 200-mesh sieve to remove large particles of impurities to obtain refined Ca(OH) 2 Slurry, resulting refined Ca(OH) 2 The slurry is aged at room temperature for more than 12h, and the aged Ca(OH) 2 The slurry is adjusted to 4% (mass percentage);

[0041]S2. Before the carbonization reaction, the refined Ca(OH) 2 Put the slurry into the supergravity-micro-interface reactor, adjust to the initial carbonization reaction temperature of 20°C, and pass in CO 2 , when the pH of the slurry drops to 7, the carbonization reaction ends, and the slurry is prepared;

[0042] S3. After the slurry obtai...

Embodiment 3

[0045] Such as figure 1 , 2 Shown, a kind of hypergravity-micro-interface mass transfer enhanced carbonization method prepares the method for cubic nano-calcium carbonate, comprises the following steps:

[0046] S1. Take highly active calcium oxide, the weight ratio of water to calcium oxide is 5:1, stir and digest at 80°C for 2 hours, and digest the Ca(OH) 2 The slurry passes through a 200-mesh sieve to remove large particles of impurities to obtain refined Ca(OH) 2 Slurry, resulting refined Ca(OH) 2 The slurry is aged at room temperature for more than 12h, and the aged Ca(OH) 2 The slurry is adjusted to 4% (mass percentage);

[0047] S2. Before the carbonization reaction, a certain amount of glucose (2% of the theoretically generated calcium carbonate mass) is added to the Ca(OH) 2 In the slurry, stir to make it evenly mixed; the refined Ca(OH) 2 Put the slurry into the supergravity-micro-interface reactor, adjust to the carbonization initial reaction temperature of 0°...

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Abstract

The invention discloses a method for preparing cubic nano calcium carbonate by a supergravity-micro-interface mass transfer enhanced carbonization method, which comprises the following steps: S1, digesting high-activity calcium oxide and water, screening Ca (OH) 2 slurry obtained by digesting, aging the refined Ca (OH) 2 slurry at room temperature, and adjusting the Ca (OH) 2 slurry obtained by aging to the required concentration; s2, adding glucose into the Ca (OH) 2 slurry, stirring to uniformly mix, adding the refined Ca (OH) 2 slurry into a supergravity-micro interface reactor, adjusting to a carbonization initial reaction temperature, and introducing CO2 until the carbonization reaction is finished to prepare slurry; and S3, performing centrifugal separation on the slurry obtained in the step S2, and drying precipitated solids to obtain a CaCO3 sample. The method has the advantages that the carbonization reaction is enhanced, the carbonization reaction time is shortened, and the cubic nano calcium carbonate with regular morphology and uniform particle size of about 50nm is prepared.

Description

technical field [0001] The invention belongs to the technical field of preparation of cubic calcium carbonate, and in particular relates to a method for preparing cubic nano-calcium carbonate by a supergravity-micro-interface mass transfer enhanced carbonization method. Background technique [0002] CaCO 3 It is an important inorganic non-metallic material, which is widely used in plastics, papermaking, coatings, medicine and other industries. Nano-CaCO 3 It has small particles, large specific surface area, excellent reinforcement and semi-reinforcement, and also produces quantum size effect, small size effect, surface effect and macroscopic quantum tunneling effect. CaCO 3 The main crystal forms are calcite, aragonite and vaterite, and the common shapes are cubic, spindle, spherical, needle-like, rod-like, etc. CaCO with different shapes 3 There are different functions and applications. [0003] Preparation of CaCO by Carbonization 3 Divided into bubbling method, spra...

Claims

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Application Information

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IPC IPC(8): C01F11/18B82Y40/00
CPCC01F11/181C01F11/183B82Y40/00C01P2004/38C01P2004/64
Inventor 童张法王伟超陈小鹏廖丹葵覃玲意黄煜贺路路李科宏
Owner GUANGXI UNIV
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